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Which of the following pair of ions make...

Which of the following pair of ions makes the water hard(temporary) ?

A

`Na^(+), SO_(4)""^(-2)`

B

`Ca^(2+), HCO_(3)""^(-)`

C

`Ca^(2+), NO_(3)""^(-)`

D

`NH_(4)""^(+),Cl^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B
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